COBB Tuning is proud to announce the release of AccessTUNER Race tuning software for AccessPORT equipped BMW N54-powered vehicles. The AccessPORT is the only hand-held OEM ECU flashing, managing and monitoring device available for N54 equipped BMWs, and when combined with our free AccessTUNER Race software, the result is a groundbreaking, end-user-tunable engine management system with all of the sophistication and drivability inherent in the factory BMW ECU.

AccessTUNER provides control of vital engine parameters to the user, such as; VANOS (both requested and actual), ignition timing, wastegate duty cycle, fuel tables, torque limiters, throttle control, rev limiters, speed limiters and many more. Over 70 tables in the DME have been exposed and are editable through AccessTUNER, giving unprecedented control of the factory BMW engine management system. Customizable data monitors let the tuner choose which DME channels are monitored to see how tuning changes impact the behavior of the engine.

The software's built-in data logging capability can capture data from over 70 channels from the DME, including; individual knock voltage for each cylinder, timing correction for each cylinder, VANOS requested and actual, wastegate duty cycle for each bank, 9 different boost related monitors and many more. Data can be recorded simultaneously from multiple monitors across the entire rev-range, allowing detailed data analysis after a dynamometer test.

3-D graphical mapping gives the user a comprehensive view of across three axis to evaluate where performance can be maximized. An integral dashboard shows user-chosen gauges to be displayed during the tuning process. The BMW AccessTUNER Tuning Guide is a great reference to learn more about how the BMW N54 DME operates and how changes to tables will impact engine performance.

Data Logging

Fuel Table

Load Target Table

Ignition Timing Table

The COBB Tuning Off-The-Shelf calibrations work as a great starting point for custom tunes, so tuning from scratch is not necessary. Users can modify OTS calibrations and create multiple maps to accommodate different bolt-on parts, turbo-upgrades, fuel types, throttle response, environments, fuel economy, etc. Once tuning is complete, all of the custom maps can be loaded onto the AccessPORT so you can be ready for any situation with just the push of a button. In addition, maps can be shared with other AccessPORT tuned BMW N54 enthusiasts. This allows more experienced tuners to help out those just getting started in tuning, and allows groups of self-tuners to work together to pool their knowledge and maximize gains for all.

With the unmatched features and convenience of the AccessPORT, COBB Tuning's exceptional customer support, and the addition of our comprehensive new AccessTUNER Race custom-tuning software, the true power of BMW N54 engine tuning has just been placed into the hands of the enthusiast!

To get your free copy of AccessTUNER Race tuning software, please fill out our AccessTUNER Race Download Request Form. An email will be sent to you with a download link within an hour of submitting the form.

As always, if you have any questions about the AccessPORT and AccessTUNER, or any other COBB Tuning products, please call us at 866-922-3059. Get up-to-date product announcements, sneak-peeks of upcoming products, and the latest COBB Tuning news through our COBB Tuning Mailing List. You can always be a part of the latest conversations with COBB Tuning by tuning in to our our facebook.com/cobbtuning and twitter.com/cobbtuning pages.

For flash tuning on E85 ideally you'd need an rpm/load/lambda/IPW reference table. With a piggyback you can work around that by fudging the fuel pressure signal and/or fudging the load values.

On the flash end I don't see any easy way to work around the fuel trims issue without having the proper tables at hand. But it might not be a big deal with say a 40% E85 mix. The DME is aware of actual load so it's going to be in the ballpark and you do have a +34% trim factor to work with. As a starting point I might take their S2+ aggressive map, bump advance up to the OEM levels, lean AFR out to the OEM levels, and then gingerly evaluate on a 40% E85 mix.

That's exactly what you with ATR now, work under the 34% cap at a 40:60 mix of E85. Any more than 40% and I personally smash into the 34% ceiling. I keep hearing cobb is working on a way to tune for more fuel, it's only a matter of time before cobb supports 100% E85 tuning.

For flash tuning on E85 ideally you'd need an rpm/load/lambda/IPW reference table. With a piggyback you can work around that by fudging the fuel pressure signal and/or fudging the load values.

On the flash end I don't see any easy way to work around the fuel trims issue without having the proper tables at hand. But it might not be a big deal with say a 40% E85 mix. The DME is aware of actual load so it's going to be in the ballpark and you do have a +34% trim factor to work with. As a starting point I might take their S2+ aggressive map, bump advance up to the OEM levels, lean AFR out to the OEM levels, and then gingerly evaluate on a 40% E85 mix.

Thats basically what im currently running, on 25% ethanol. FWIW, i logged this on 15% ethanol and still had 0 timing drops.